This is BibTeX, Version 0.99dThe top-level auxiliary file: main.aux
The style file: abbrv.bst
I couldn't open database file main.bib
---line 22 of file main.aux
 : \bibdata{main
 :              }
I'm skipping whatever remains of this command
I found no \citation commands---while reading file main.aux
I found no database files---while reading file main.aux
(There were 3 error messages)